Sexual Inversion
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Perfil dos esteroides gonadais e expressão dos hormônios folículo estimulante (FSH) e luteinizante (LH) durante a inversão sexual de Epinephelus marginatus (Teleostei: Serranidae), hermafrodita protogínico, utilizando-se inibidor de aromatase / Gonadal steroids profile and expression of follicle-stimulating (FSH) and luteinizing (LH) hormones during the sex reversal of Epinephelus marginatus (Teleostei: Serranidae) hermaphroditic protogynous, using aromatase inhibitor
A plasticidade do desenvolvimento gonadal em peixes, que contrasta com os padrões mais estáveis encontrados nos demais vertebrados, deu origem a várias questões intrigantes relativas tanto ao seu significado adaptativo quanto aos fatores genéticos e fisiológicos que modulam o processo. A inversão do sexo em peixes hermafroditas seqüenciais (protândr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/08/2012
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2. No cinema com a psicanálise: Seven e a perversão
This present paper intends to works with studies about perversion, including the conception of deviant sexuality, from Middle age, to the structuralist studies proposed by Jacques Lacan, verifying in the movie Seven, by David Fincher, the possibility of interpreting that John Does acts are characteristics of perversion. Our object is to demonstrate how the s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/05/2012
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3. Produção de populações monossexo macho de tilápia-do-nilo da linhagem Chitralada.
A fim de avaliar o efeito da alta temperatura na proporção de sexos da tilápia-do-nilo (Oreochromis niloticus) da linhagem Chitralada, foram conduzidos dois experimentos. No primeiro foram analisados, por 28 dias, os efeitos da temperatura de 35ºC, em relação ao controle (27ºC), iniciando-se dez dias após a eclosão. Foi encontrada diferença signifi
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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4. Levels of 17-methyltestosterone in different temperatures on sex inversion of Nile tilapias Oreochromis niloticus. / NÃveis de 17-α metiltestosterona em diferentes temperaturas na inversÃo sexual de tilÃpias- Oreochronis niloticus
Due to sexual precocity and higher growth rate of Nile tilapia males in relation to females, several techniques on sex inversion, more specifically the masculinization or production of mono-sex populations, have been praised. Among the techniques used for sex inversion in tilapias, the most disseminated around the world and Brazil is the hormone usage incorp
Publicado em: 2007
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5. AnÃlise cariotÃpica em Lonchorhina aurita e Trachops cirrhosus (Chiroptera: Phyllostomidae) usando diferentes tÃcnicas citogenÃticas
In this work chromosomal features of the species of Phyllostomidae bats Lonchorhina aurita (Lonchorhininae) and Trachops cirrhosus (Phyllostominae) were studied. Different cytogenetic techniques were used, including conventional analysis, G and C-banding, staining with silver nitrate and base-specific fluorochromes. Data regarding the conventional analysis o
Publicado em: 2006
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6. Reporter genes and highly regulated promoters as tools for transformation experiments in Volvox carteri.
The multicellular alga Volvox is an attractive model for the study of developmental processes. With the recent report of successful transformation, regulated promoters as well as reporter genes working in this organism are now required. The Volvox genes encoding arylsulfatase and the extracellular glycoprotein ISG are strictly regulated. The former is transc
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7. The Chromosomal Basis of Sexual Isolation in Two Sibling Species of Drosophila: D. ARIZONENSIS and D. MOJAVENSIS
The chromosomal determination of interspecific differences in mating behavior was studied in the interfertile pair, Drosophila arizonensis and Drosophila mojavensis, by means of chromosomal substitutions. Interspecific crossing over was avoided by crossing hybrid males to parental females, and identification of the origin of each chromosome in backcrossed hy
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8. Change in a secondary sexual character as evidence of incipient speciation in Drosophila silvestris*
Search for genetic changes that are pivotal in species formation has led to intraspecific studies of Drosophila silvestris, a giant species found only on the geologically new island of Hawaii. Males bear large, curved, modified bristles or cilia on the dorsal surface of the foreleg tibia and tarsus. In males from the south and west parts of the island there
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9. Enzymes and Reproduction in Natural Populations of DROSOPHILA EURONOTUS
Populations of Drosophila euronotus, one from southern Louisiana (3 samples), and one from Missouri (2 samples), were classified for allele frequencies at alkaline phosphatase (APH) and acid phosphatase (ACPH) loci. The two populations differed consistently in allele frequencies at both loci. The APH locus is on the inversion-free X chromosome; the chromosom
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10. De Novo Methylation of Repeated Sequences in Coprinus Cinereus
We have examined the stability of duplicated DNA sequences in the sexual phase of the life cycle of the basidiomycete fungus, Coprinus cinereus. We observed premeiotic de novo methylation in haploid nuclei containing either a triplication, a tandem duplication, or an ectopic duplication. Methylation changes were not observed in unique sequences. Repeated seq
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11. A Study of the Genetic Basis of the Sexual Dimorphism for Wing Length in DROSOPHILA MELANOGASTER
The genetic basis of a sexually dimorphic quantitative character in Drosophila melanogaster was investigated by means of two-way directional selection for increased and decreased differences between male and female wing length. The sex dimorphism (SD), defined as the mean wing length difference between the sexes, within families, provided the criterion for s
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12. Towards a rational terminology in the study of the gubernaculum testis: arguments in support of the notion that the cremasteric sac should be considered the gubernaculum in postnatal rats and other mammals.
There is need for a consistent definition of structures caudal to the testis that variously are termed 'gubernaculum testis' as a basis for understanding the emergence and sexually dimorphic further growth and differentiation of this specifically mammalian structure. Rodent fetuses undergo a stage of development during which there is almost complete unanimit